Note: The names of certain sealers have been altered for legal reasons.

Also known as sodium silicate, water glass is a solution that may appear as a barely solid agent or a thick liquid. It has a number of uses, with many of them related to the manufacture of products used for building materials, textiles, and fire safety. When combined with magnesium silicate in a water solution (such as a engines cooling system), this material can also be used to seal head gaskets since it reverts back to a solid when it reaches about 200 degrees.

Back in the 60's and 70's when all engines were made of steel, water-glass based sealers could actually seal a cracked head gasket (at least for a short time), because steel only expands and contracts about 12%. Now, almost all vehicles have aluminum cylinder heads and more and more now have aluminum engine blocks as well.

Today's newer aluminum engines create a huge problem for water-glass based sealers, because aluminum expands and contracts about 33% more than steel. Water-glass brands simply cannot expand or contract because it's glass, so it simply cracks off. Todays newer vehicles require a liquid sealer that can flex and expand with the engines aluminum parts so as to not just crack-away. So far, the only brand we've found that doesn't use water-glass as a main ingredient is Dura-Seal.

Finally, another problem with water-glass based sealers is that they cure at about 200 degrees. Most newer vehicles now operate between 195 to 225 degrees. If you used a water-glass based sealer it would cure in every area of the engine causing clogs. Dura-Seal doesn't use water-glass, so each kit can be customized to your engine's unique temperature at the cylinder head. This prevents Dura-Seal from curing in other areas of the engine. We think that's pretty smart...

There's a lot of products out there which claim to seal head gaskets but many of them are totally useless and others can even harm your engine. The reason most sealers don't work is simple, Barz, K+W, Blue Dev_l, Steal Seel, Thremagazket and more all use water-glass as their ingredient.

What happens when water-glass starts to crack-away? That's an easy question to answer. Would you want to chew broken glass in your mouth? Of course not, but that's what your engine begins doing.

An engine's water-pump, radiator, heater-core, intake manifold gasket and especially it's rubber coolant lines and radiator hoses begin to be torn apart by tiny pieces of that broken water-glass. It could be compared to getting sand in your veins, not good for anything in there is an major under-statement.

Enough said on water-glass based sealers like Barz, Blue Dev_l, Steal Seel, K+W, Thremagazket, and others. If you still decide to try one of those water-glass based brands, you may have already gotten sand in your veins and it's starting effect your brain. LOL...

Any brands that don't use water-glass..? Just Dura-Seal® and PermaTech®

Not many. We have tested every liquid head gasket sealer on the market and the only brands we've found that do not use water-glass as a main ingredient is Dura-Seal® made by ABX USA Corp. and PermaTech®which makes a liquid epoxy type head gasket sealer. Both brands appear to stay flexible after curing and did not crack-away after we used them and later disassembled the test engines to check and see. We also tested the other-brands like Barz, Blue Dev_il, Steal Seel, K+W, and Thremagazket.The Dura-Seal® Brand came out the winner,Here's the break-down as to what happened...

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K+W Liquid Sealer:
Used on a 1995 Cadillac/
Symptoms: Running hot, high compression in cooling system, pushing water out of over-flow tank.

After using the K+W Liquid Sealer: Still running hot, still very high compression in cooling system, still pushing water out of over-flow tank after 17 minutes of idling in park, still mixing water in oil. Clogged thermostat, engine shut down after 26 minutes of idling in park with solution in engine due to overheating.

Dura-Seal Liquid Sealer with Extreme Powder Additive:
Used on same 1995 Cadillac as above/
Symptoms: Running hot, building very high compression in cooling system, pushing water out of over-flow tank, water mixing with oil.

After using the Dura-Seal Liquid Sealer: Temperature down to 217 degrees, normal compression in system, no water mixing with oil. Had occasional temperature spike on highway at 65-75 MPH but would level off back down at about 205 degrees. Not bad, no negative effects after 24 hours. We're very surprised that the Dura-Seal worked on this car after K+W did absolutely nothing. Good product!

The reason the Dura-Seal worked must have to do with Dura-Seal not containing water-glass as a main ingredient and this Cadillac has an all aluminum engine. Apparently the Dura-Seal could flex with the metals and not crack off like the K+W Sealer. We are going to try it on that 01 BMW to see what it does in that engine with aluminum heads, gotta work better than the Steal Seel did. LOL...

Barz Liquid Sealer:
Used on a 1997 Ford Escort/
Symptoms: White steam out of tailpipe, coolant mixing with oil, running hot, loss of compression in coolant-side and oil-side of engine.

After using the Barz Liquid Sealer: Still steam from tailpipe, coolant still mixing with oil, compression better by 4psi/2psi. Really was not worth our time.

Blue Dev_il Liquid Sealer:
Used on a 2002 Volvo/
Symptoms: White steam out of tailpipe, running hot, loss of compression in coolant-side of engine.

After using the Blue dev_il Liquid Sealer: No steam, still running hot at 238+, compression better by 7psi, Sealer clogged the heater-core and thermostat causing engine to overheat and crack cylinder head after 1 hour and 37 minutes of idling in park. Bad product!

Steal Seel Liquid Sealer:
Used on a 2001 BMW/
Symptoms: Running hot, very high compression in cooling system, would actually blow upper radiator hose off radiator after 5 minutes of idling in park.

After using the Steal Seel Liquid Sealer: Running cooler, did not overheat, still very high compression in coolant system, water being pushed out of over-flow tank after 22 minutes of idling.
Better results than Barz and Blue Dev_il but it did not repair head gasket.

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POSTED REVIEWS: For Dura-Seal® Head Gasket Sealers

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Submitted by: Mike G. Member since: 2013

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>> Lets see what others are saying about Duar-Seal® products...

June 15, 2013 by UTUBE User: Brain6845

Steal Seel Complaint - Posted From: www.mythreecents.com by: stewarja on 2009-07-10I recently bought a 2003 Nissan Sentra GXE with the 1.8 engine for my daughter. I noticed that the car was using about 1 quart a week of antifreeze. I could not find any leaks, but after awhile it began to blow white smoke out of the exhaust and I could smell antifreeze coming of the exhaust when it started up. I did some research on "Steel Seal". I was very skeptical, and was concerned it might cause other damage, but I thought I'd give it a try since I intended to swap out the engine if it did not work anyway. I followed the instructions exactly, left it to cool down overnight. When I drove the car the next day, it appeared to do absolutely nothing to fix the car. The white smoke was not that bad, so I thought I'd drive it a few days and see. On the 2nd time I drove the car all of the sudden when all the way up on the temperature gauge and the car started running badly. This rise in the temp. had never happened before. I drove it a few and parked the car. After the car cooled down, I pulled the radiator cap. To my amazement, the radiator was completely plugged with a hard white polymer (note when I added the Steel Seal it was clean metal). Bottom line, now I need a new radiator too. DO NOT put this product in your car, you will be very sorry.

Dura-Seal Review: I have a 2001 Chrysler Sebring 2.7 V6, notorious for oil leak problems. I purchased a bottle of the Dura Seal Oil Stop Leak, after about 150 miles & approximately 3 days, as predicted on the directions, the leak was ENTIRELY gone! In addition & serendipitously, the oil light shut off, for the FIRST time in over a year & 10,000 miles! I reset the Check Engine light & passed CA State Emissions Inspection with no further leaks or oil or Check Engine Lights in over a year & additional 10,000 Miles. The dura seal stuff is truly amazing but not cheap...
G.Yorks - Lancaster, Nebraska

Steal Seel Complaint - Posted From: www.mythreecents.com Posted by usafaviator on 2011-10-09:
I ordered Steel Seal for my 98 BWM 528i and followed the directions to the T. Didn't work. Contacted the company and they sent another treatment...didn't work. Save your money and just get the head gasket done right. You will end up wasting the money on Steel Seal that you will end up spending more anyway!

Steal Seel Complaint - Posted From: www.mythreecents.com Posted by Clive on 2013-06-08:
Well today steel seal has just stuffed my radiator too. Seems to be a bit of a pattern emerging here. DON'T USE THIS PRODUCT YOU CAN'T BE SURE WHAT DAMAGE IT WILL DO.

Dura-Seal Review: I just purchased your Dura-Seal Head Gasket Repair liquid.... and it was my last attempt at repairing the truck I had just bought... I say Last attempt because it WORKED!!!!! It has completely sealed the head gasket leak! THANK YOU SOOOOO MUCH!!!!! Because of this fix, your dura-seal saved me $1800 bucks!
E. D. - Rusk, Jersey City, NJ

Dura-Seal Complaint - Posted From: www.head-gaskets-repair.com by: mikie on 2011-1-21I just had to write to you guys. I have a 1999 Ford pickup 150. The rear seal was leaking a quart of oil every 100 miles, and to change this seal I would have had to pull the motor, so I had nothing to lose to try your DuraSeal Oil Stop Leak. After 2 trips to town, I have ZERO leaks from the motor. Thanks for making a good product! Oh, and I did try your Speed Wax, it really is better than any of the other waxes from the auto-stores... But I feel your prices are too high! You should lower your prices!!!
M. C. - Providence, MD.

Dura-Seal Review: My 2003 Ford Ranger started losing coolant about a week ago, so I replaced the thermostat. That didn't't work so I took it to a shop that told me I had a cracked block or blown head gasket and it would be $1800 to $2500 to fix it. Since I have 140,000 miles I knew that didn't make sense to me. I saw your Dura-Seal sealer on the web and gave it a try. I put it in a couple of days ago and it has amazed me how well it has worked. The truck quit losing coolant, runs 100% better and I think I may get another 100,000 miles out of it. Thanks!
J. M. - Austin, TX

Thermagasket Complaint - Posted From: www.complaintsboard.com by: abrome on 2012-11-24Stay away from that stuff! Alot of money for a ThermaGasket Head Gasket Sealer product and it totally clogged my radiator and engine!!! Stay away from that stuff… They didn't even return my calls for almost 2 weeks!!! That company ThermaGasket (AKA) rxauto. com are horrible. They told me they would not be giving me a refund or helping to pay for a new radiator...

Dura-Seal Review: I had coolant leaking into my engine oil on a 97 Corsica with 150,000 miles. Symptoms of a blown head gasket. Did a lot of research on the Internet to help me fix the problem and I feel I should also reply to others looking for help. I used dura-seal head and block sealant. I said my prayers and followed their instructions. IT WORKS. My engine tapping noise went away and so far(3 months) have not lost any coolant and oil looks nice and clean. I feel very fortunate I used this product. I must say I was skeptical, but other user feed back help me try it, that's why I am adding this feedback.C. R. - Springfield, MO

Thermagasket Complaint - Posted From: www.complaints.com by: 5ca3002b on 2010-07-19Thermagasket by RxAuto.com product does not work. tried it on 1997 bmw 328i. spoke to company tech rep. said to try it again. paid 21$ more for retry. caused catalytic converter to plug. cost 800.00$ to fix.leak still not fixed. junked car. asked for refund of the 125.00$ .co refused saying that i tried twice and no refund due.[fine print in their directions]

Bars Head Gasket Sealer Complaint - Posted From: www.pisscustomer.com by: 404 on 2010-07-19
The Bar's product is using sodium silicate (class) and sealants that practically welded all the internal engine cooling parts and stop coolant circulation A few days ago, before I added Bar's Product, the mechanic told me, that my car engine and transmission were in very good condition. Not problem found. None The car had an intermittent coolant small leak, but after I used BAR'S, it damaged the whole engine by extreme overheating All BAR'S reviewed in the Internet are false, posted by Bar's Products people and there are not posted by customer that bought the product Bar's deceives people by posting false reviews to entice people to buy the Bar's Head Gasket Fix Repair Sealer

Dura-Seal Review: I just used this duraseal in my 92 Mazda MX 3 for a blown head gasket.I used it and the smoke went away in about 5 minutes. No loss of coolant anymore and my engine is running a lot better, I guess it sealed up the compression loss at the head. I'm very happy with the results.Michigan/ Sally, M. Salt Lake City, UT.

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POSTED REVIEWS: For Dura-Seal® Head Gasket Sealers

>> Lets see what others are saying about Duar-Seal® products...

June 15, 2013 by UTUBE User: Brain6845

Dura-Seal Review: From>> www.fixya.comby: S. Williams on 2013-01-17I think your dura seal is an excellent product. I also think that it is reasonably priced compared to actually having my head gasket replaced. You do have to make sure that you follow the directions. I forgot to do the air-dry time and didn't take advantage of their free tech service and only got a partial seal. But I called the duraseal customer service people and they sent me out another application for free but I did have to pay the shipping on it. The second time I did follow the directions correctly and yes it did seal the head gasket leak very well. No more white smoke, no more coolant loss. Oh and that time i did call the their tech dept. and they went over the instructions in detail with me over the phone. I guess i should have done that the first time. I'd recommend their product to anyone.
A. R. Kirkwood, Ohio.

Dura-Seal Review: From>> www.forums.corvetteforum.comby: bubba91 on 2011-05-17I had a blown head gasket and tried Dura-seal with "bated breath", but it worked. Who knows how long it will hold, It took a few heat cycles (per instructions), but it is not overheating anymore. Before using it I couldn't even make it around the block before it would overheat. I couldn't be happier!

Dura-Seal Review: From>> www.fixya.comby: S. Williams on 2013-01-17I had a blow head gasket on my BMW 6 cyl. and it was blowing white smoke and losing alot of coolant. After doing alot of research I found that all the other brands all use water-glass. The only company that does NOT USE WATER-GLASS was dura-seal. If you have aluminum heads it's very important to use a sealer that can flex with your engine's aluminum heads. The dura seal actually stays flexible! So I tried it and it stopped the smoke and overheating. No more coolant loss either. It's been running fine for over a year now. I would reccomend dura seal head gasket sealer to everyone... Great product! Also the tech department guys really know what they are talking about...

Dura-Seal Review: I've been semi-trucking for over 22 years. Over the years I've used a variety of products, but none have worked as well as your DuraSeal head gasket sealer. For instance, last year the head gasket on my Kensworth diesel engine started leaking coolant in the oil, that's real bad because it costs around 12,000 dollars to replace it on a semi-truck. With the economy the way it is, I couldn't afford to do that! I used your duraseal and I was amazed. It simply worked!!!
Kenny, M. Clark, Texas

Dura-Seal Review: Last week while on vacation my intake manifold gasket on my Chevy Tahoe started leaking faster than we could pour it back in. We added a bottle of your dura seal sealer for the intake gasket and it stopped the leak in only a matter of minutes, the leak stopped and we traveled home safely. Great product. And a personal thanks to Chris in your tech dept. It was nice being able to have him go over the instructions with me over the phone, I'm not a mechanic but luckily He is...
M. W. - Gorbit, Texas

Bars Head Gasket Complaint - Posted From: www.pissofcustomer.com by: bud on 2013-05-25Bar's permanent head gasket fix, the masters of BS. It is full of *** in a bottle. It damaged my Honda Civic motor. Do not use it, Bars is full of unknown s**t. Make a consumer report if you have the some problems.

Dura-Seal Review: When changing the oil in my truck, my neighbor came over and asked if I was a mechanic. I assured him that I wasn't. He told me his head gasket leaking from between the head and block. He couldn't afford to take the car to the shop and have it repaired. I told him about your duraseal product and he bought some for it. We performed the repair together and actually got the head gasket sealed up that day. We could actually see the external coolant leak slowly stop. My neighbor thanked me profusely and walked away smiling. But I wanted to actually take the time to thank you guys...
Paul, B. - Jackson, TN.

Steel Seal Complaint - Posted From: www.complaintsboard.com by: apinek on 2012-05-11
I have a mustang 6 cylinder and used the Steel Seal Head Gasket Sealer on it to repair the leaking head gasket but it actually clogged my radiator and heater core!!! Plus it never did seal my head gasket! My mechanic told me it's going to cost me over 1000.00 dollars to have those parts replaced!!! I don't have that money so I'm having to take the bus to work!!! Those people over there at steel seal customer service never answer the phone. I've left messages and no ones ever called me back… That company sucks!!!

Dura-Seal Review: From>> www.forums.corvetteforum.comby: bubba91 on 2011-05-17I had a blown head gasket and tried Dura-seal with "bated breath", but it worked. Who knows how long it will hold, It took a few heat cycles (per instructions), but it is not overheating anymore. Before using it I couldn't even make it around the block before it would overheat. I couldn't be happier!

Dura-Seal Review: From>> www.fixit.comby: Lori Thomson on 2012-01-12I'm an older lady and retired, I could not afford a head gasket replacement on my 2002 Cadillac so I tried the dura-seal and it really worked for me! I had a hard time finding them so if anyone else needs the dura seal, I've pasted some videos on it and their contact information below.

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